<template>
	<!-- 未来30天访问量趋势预测图 -->
	<div class="echarts" id="OverNext30Chart"></div>
</template>

<script setup lang="ts">
// Echarts 为init（dom元素后的类型）
// EChartsOption 为 option 的类型
import { ECharts, EChartsOption, init } from "echarts";
interface ChartProp {
	unit: string[];
	data: number[];
}
const initChart = (data: any = {}): ECharts => {
	const charEle = document.getElementById("OverNext30Chart") as HTMLElement;
	const charEch: ECharts = init(charEle);
	const option: EChartsOption = {
		tooltip: {
			trigger: "axis",
			confine: true,
			formatter: (params: any) => {
				let tipData = params[0];
				let html = `<div class="lineChart-bg">
                        <span style="">${tipData.name} <i >${tipData.value}</i> 人次访问</span>
                    </div>`;
				return html;
			},
			backgroundColor: "transparent", //提示标签背景颜色
			borderColor: "transparent",
			axisPointer: {
				lineStyle: {
					type: "dashed"
				},
				snap: true
			},
			extraCssText: "box-shadow: none;padding:0"
		},
		grid: {
			top: "15%",
			left: "5%",
			right: "5%",
			bottom: "15%"
			// containLabel: true
		},
		xAxis: [
			{
				type: "category",
				boundaryGap: false,
				axisLine: {
					//坐标轴轴线相关设置。数学上的x轴
					show: true,
					symbol: ["none", "arrow"],
					symbolOffset: [0, 30],
					lineStyle: {
						color: "#233653",
						shadowOffsetX: 20,
						shadowColor: "#233653"
					}
				},
				axisLabel: {
					//坐标轴刻度标签的相关设置
					color: "#7ec7ff",
					padding: 0,
					fontSize: 12,
					formatter: function (data) {
						return data;
					}
				},
				splitLine: {
					show: false,
					lineStyle: {
						color: "#192a44"
					}
				},
				axisTick: {
					show: false
				},
				data: initDate()
			}
		],
		yAxis: data.unit.map((val: ChartProp, index: number) => {
			return {
				name: "(访问量)",
				nameTextStyle: {
					color: "#7ec7ff",
					fontSize: 12,
					padding: [0, 30, -4, 0]
				},
				// nameGap:18,
				minInterval: 1,
				splitLine: {
					show: false,
					lineStyle: {
						color: "#192a44"
					}
				},
				axisLine: {
					show: index === 0 ? true : false,
					lineStyle: {
						color: "#233653"
					}
				},
				axisLabel: {
					show: true,
					color: "#7ec7ff",
					padding: 0,
					formatter: function (value: string) {
						if (Number(value) >= 10000) {
							value = Number(value) / 10000 + "w";
						}
						return value;
					}
				},
				axisTick: {
					show: false
				}
			};
		}),
		series: data.data.map(() => {
			return {
				name: "",
				type: "line",
				symbol: "circle", // 默认是空心圆（中间是白色的），改成实心圆
				showSymbol: false,
				smooth: true,
				lineStyle: {
					width: 1,
					color: "#707070", // 线条颜色
					borderColor: "#707070"
				},
				itemStyle: {
					color: "#F5B348",
					shadowColor: "rgba(245, 179, 72, 0.3)",
					shadowBlur: 3
				},
				emphasis: {
					scale: true
				},
				areaStyle: {
					//区域填充样式
					//线性渐变，前4个参数分别是x0,y0,x2,y2(范围0~1);相当于图形包围盒中的百分比。如果最后一个参数是‘true’，则该四个值是绝对像素位置。
					color: {
						type: "linear",
						x: 0,
						y: 0,
						x2: 0,
						y2: 1,
						colorStops: [
							{
								offset: 0,
								color: "#846B38" // 0% 处的颜色
							},
							{
								offset: 0.5,
								color: "#403E47" // 0% 处的颜色
							},
							{
								offset: 1,
								color: "#11144E" // 100% 处的颜色
							}
						],
						global: false // 缺省为 false
					},

					shadowColor: "rgba(255, 199, 37, 0)", //阴影颜色
					shadowBlur: 20 //shadowBlur设图形阴影的模糊大小。配合shadowColor,shadowOffsetX/Y, 设置图形的阴影效果。
				},
				data: data.data
			};
		})
	};
	charEch.setOption(option);
	return charEch;
};
// js 获取当前日期到之后一个月30天的日期区间
const initDate = (): string[] => {
	let dateList = [];
	let startDate = new Date();
	let endDate = new Date();
	endDate.setDate(startDate.getDate() + 30);
	startDate.setDate(startDate.getDate() + 1);
	while (endDate.getTime() - startDate.getTime() >= 0) {
		let month =
			(startDate.getMonth() + 1).toString().length === 1 ? "0" + (startDate.getMonth() + 1).toString() : startDate.getMonth() + 1;
		let day = startDate.getDate().toString().length === 1 ? "0" + startDate.getDate() : startDate.getDate();
		dateList.push(month + "/" + day);
		startDate.setDate(startDate.getDate() + 1);
	}
	return dateList;
};
defineExpose({
	initChart
});
</script>
<style lang="scss" scoped>
.echarts {
	width: 100%;
	height: 100%;
	:deep(.lineChart-bg) {
		box-sizing: border-box;
		display: flex;
		align-items: center;
		width: 180px;
		height: 60px;
		padding-left: 20px;
		background: url("../images/line-bg.png") no-repeat;
		background-size: 100% 100%;
		span {
			font-size: 12px;
			color: rgb(255 255 255 / 80%);
			i {
				font-style: normal;
				color: #f5b348;
			}
		}
	}
}
</style>
